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https://issues.apache.org/jira/browse/FLINK-31160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17713992#comment-17713992
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Dong Lin commented on FLINK-31160:
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Merged to apache/flink-ml master branch
e843b300b47a1ee3446296a359528a6b39566eed.
> Support join/cogroup in BroadcastUtils.withBroadcastStream
> ----------------------------------------------------------
>
> Key: FLINK-31160
> URL: https://issues.apache.org/jira/browse/FLINK-31160
> Project: Flink
> Issue Type: Improvement
> Components: Library / Machine Learning
> Affects Versions: ml-2.0.0, ml-2.1.0, ml-2.2.0
> Reporter: Zhipeng Zhang
> Assignee: Zhipeng Zhang
> Priority: Major
> Labels: pull-request-available
> Fix For: ml-2.3.0
>
>
> Currently BroadcastUtils#withBroadcastStream does not support cogroup/join,
> since we restricted that users can only introduce one extra operator in the
> specified lambda function.
>
> To support using join/cogroup in BroadcastUtils#withBroadcastStream, we would
> like to relax the restriction such that users can introduce more than more
> extra operator, but only the output operator can access the broadcast
> variables.
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